A suicide bomber killed a Turkish security guard at the U.S. embassy in Ankara on Friday, blowing the door off a side entrance and sending smoke and debris flying into the street.

Ankara Governor Alaaddin Yuksel said the attacker was inside U.S. property when the explosives were detonated. The blast sent masonry spewing out of the wall of the side entrance, but there did not appear to be any more significant structural damage.